Stovepipe.



W. W. GRAHAM.A

STOVBPIPE.

APPLIUATIQH FILED MAR. 21, 1908.

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y @munter WMI/@mf QW- www@ I 'I'r'fr "Unire STATES PATENT OFFICE.

WILLIAMW. GRAHAM, 0F NEW PHILADELPHIA, OHIO.4

STOVEPIPE.

Figure 1 is a view of a stove pipe sectionv showing the joint closed. Fig` 2 is a similar View showing the joint open. Fig. 3 is a section taken on line X-X, Fig. 1. Fig. 4 is a view taken on line Y--Y, Fig. 2.

The present invention has relation to stove-pipes and has more 'specific reference to the joints connecting the longitudinal edges of the cylindrical body of the pipe section. c

Similar numerals of reference indicate corresponding parts in all .the igures of the drawings.

In the accompanying drawing.l 1 represents a section of pipe, which may be formed ot' any desired size-and lengt-h, reference he ing had to the desired size of the finished pipe. It will also he understood that any nuluher ot sections may he connected together to produce a stove pipe ot' the desired length. ()ne ot' the longitudinal edges oteneh section is tolded hack and upon the inner surtace of the same for a short distance and a sectmd fold then given. thereby producing the .spaced portions?. and 8, which spaced portions constitute a groove adapted to receive'the opposite raw or unfolded edge ot' the section.

At short distances hack ot the raw edge 4' are. located any desired number of nihs 5, which are pressed outward or ext-end in an outward direction utter the section has been brought. into cylindrical torni. By so pressing out the nihs, it will he nmlerstood that the. metal at the sides ot' .said nihs will neces- /sarily he. drawn or weakened so that the l said nihs may he readily punched through to torni apertures. The folded niemher 2,

' the hody otthe pipe section 1 and the portion 3 are. eheh provided with apertures 6, which apertures are so formed that they will register one with the other. (l in thel portions l and 2 are t'or the purpose ot receiving the nlhs 5 when the untolded p y Specification of Letters Iaterit.

Application led March 21, 1908. Serial No.

'lhe apertures.

edge of the pipe section is arranged within' the groove constituted by the portions 2 and 3. lVhen so arranged the said nibs assist in holding the said unfolded edge Within said groove and will constitute a suiiicient fastenlng for said edges except at the end voit the Patented Nov. 23, 1909.

pipe which may he termed the outerpve'rf lapping end when two pipehsections are opnneeted together.

The edges at the ouer,

over-lapping end, into which the end of an adjacent pipe section is inserted should be more securely fastened, and for this purpose the rivet 7 is employed. In this connection a second important purpose of the apertures 6 will he. clearly understood. It is frequently desirable to cut portions from the standard lengths ot pipe sectionsin order to provide a pipe of suitable length to properly connect the stove or furnace with the chimney and as above noted itis importantthat a seam fastening rivet he locatedk at the end of the section into which an adjacent section is to he inserted. In using pipe sections constructed in accordance with the present invention, the unheaded end of the rivet may be inserted through the aperture in the memher 3 into engagement with the inneigvconcave, drawn or weakened walls of the nib 5, which nib registers with the aperture 6 in the portions 1 and 2, thus providing for the .ready and convenient punching through of the said nih hy placing a block otwood or other suitable-material exteriorly upon the 'portion 1v over the said aperture 6, while the rivet is located in the aperture 6 of the portion 5i and in the nih and `striking a blow upon said block. the head of the rivet resting upon a suitable supportextending into the interior ot' the section at the end where the rivet is located. In this manner the unheaded end of the rivet will readilyl punch the top portion of the nib 5 through the aperture G in the portions 'l and 2, the operation being facilitated by reason of the Weakened condition ot the walls of the nib 5 and the reinforced walls of the aperture 6 in the portions 1 and 2 by reason of the fact that said portions are t'olded upon each other, thus constituting a portion of double thickn'ess and strength well adapted to act in eonjunct ion with the rivet to punch through the nih. Atter the rivet has punched through the nih and extends through the aperture (5 in theportions l and 2, it may be headed down, thus firmly fastenmg the untlanged edge within the groove at that polnt.

`I claim as new and desire to seeure by Letstove pipesection provided` withlongitudinal seam edges, one of saided es folded beck u on the inner surface of t e section for a ort distance and a second fold given 'i5 to said e, the said folded portions constituting t e sides of a groove adapted to the opposite unfolded edge of the section,. said folded portion provided with apertures, yand vseid unfolded edge provided with outwardly pressed and drawn nibs 20 adapted tol reglster with the apertures and one end of the section provided with a rivet,

said rivetentered through the registeringl aperture in the folded portion of4 the/section,

ustantially as and for the purpose speci- 25 In testimony tht `Il claim the above, l have hereunto subscribed my name inthe presence of two Witnesses. l

p WILLIAM W. GRAHAM. Witnesses: i

P. S. OLMSTEAD, W. S.ENGLISH. 

